20312641206631 has 8 divisors (see below), whose sum is σ = 20568033863424. Its totient is φ = 20058801089280.

The previous prime is 20312641206617. The next prime is 20312641206661. The reversal of 20312641206631 is 13660214621302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20312641206631 is a prime.

It is a super-2 number, since 2×20312641206631² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312641206661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388108530 + ... + 388160863.

It is an arithmetic number, because the mean of its divisors is an integer number (2571004232928).

Almost surely, 2^{20312641206631} is an apocalyptic number.

20312641206631 is a deficient number, since it is larger than the sum of its proper divisors (255392656793).

20312641206631 is a wasteful number, since it uses less digits than its factorization.

20312641206631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776269721.

The product of its (nonzero) digits is 62208, while the sum is 37.

Adding to 20312641206631 its reverse (13660214621302), we get a palindrome (33972855827933).

The spelling of 20312641206631 in words is "twenty trillion, three hundred twelve billion, six hundred forty-one million, two hundred six thousand, six hundred thirty-one".